PartsTable
Technical Data Sheet
1631-400 ✓ Verified by PartsTable
· HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, seat_type: BEVELED, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: SCREWED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-189-2602, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
1631-400
NSN: 4730-00-189-2602
FSC: 4730
CAGE: 72426 — FLATON MACHINE WORKS INC. (USA)
SPECIFICATIONS
materialIRON OVERALL
seat_typeBEVELED
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorSCREWED
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size2.000 INCHES ALL ENDS IN
coupling_flange_shapeHEXAGON
maximum_operating_temp218.0 CELSIUS SINGLE RESPONSE DEGC
nominal_overall_length3.375 INCHES IN
media_for_which_designedSTEAM SINGLE RESPONSE
NSN4730-00-189-2602
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1631-400 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
MEDIA FOR WHICH DESIGNED: STEAM SINGLE RESPONSE
MATERIAL: IRON OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-I-666 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A-197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
COUPLING FLANGE SHAPE: HEXAGON
NONDEFINITIVE SPEC/STD DATA: XA TYPE
SEAT TYPE: BEVELED
REDUCER TYPE: CONCENTRIC
TECHNICAL CHARACTERISTICS (FLIS)
MEDIA FOR WHICH DESIGNEDSTEAM SINGLE RESPONSE
MATERIALIRON OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-I-666 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A-197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
COUPLING FLANGE SHAPEHEXAGON
MATERIALIRON OVERALL
NONDEFINITIVE SPEC/STD DATAXA TYPE
SEAT TYPEBEVELED
REDUCER TYPECONCENTRIC
NOMINAL THREAD SIZE2.000 INCHES ALL ENDS IN
COUPLING FLANGE SHAPEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
102374Interchangeable
interchangeable cross-reference
interchangeable
819E2Interchangeable
interchangeable cross-reference
interchangeable
1280BLACK1-4INInterchangeable
interchangeable cross-reference
interchangeable
ASME B16.39Interchangeable
interchangeable cross-reference
interchangeable
MILU18250TYPEXAInterchangeable
interchangeable cross-reference
interchangeable
7227Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
Ready to buy 1631-400?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 1631-400?
1631-400 is a UNION,PIPE.
What parts can replace 1631-400?
There are 15 known substitutes for 1631-400: 102374, 819E2, 1280BLACK1-4IN and 12 more. Substitute compatibility should be verified for your specific system.
Is 1631-400 still available?
1631-400 is currently cancelled.
Community Feedback
Comments (0)
Loading comments...
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Need a quote for 1631-400?